** Failure with CrossRef search for any DOI **

I have been working with EndNote to manage my references for a while and the work has been done smoothly until last week. Last week I tried to import some 10-odd PDFs into my library but all of them ended up with "<>" entries. If you looked into one such entry, you would find that the DOI number had been taken out of the PDF correctly. In the beginning I thought it was an Internet problem or the CrossRef server was temporarily down. So I waited and repeated the importing work the next day, still the same failure. I tried daily until today, unsuccessful. Frustrating, isn't it? By reading the posts, I know that if a DOI is not yet indexed by the CrossRef server, the search would return a "<>" entry. But this is not the case here. For example, this DOI

10.1073/pnas.1523119113

could be successfully found with a PubMed search in EndNote. A manual search at the crossref website confirmed that it had been indexed.

So, can anyone here confirm with me if you can/cannot find this DOI with CrossRef in your EndNote? If you can, what goes wrong with my EndNote X9 and how can I solve the problem ... so that I can continue to import PDFs as usual?

Re: ** Failure with CrossRef search for any DOI **

today, I was able to paste the below in a blank record in the DOI field and it worked! maybe they fixed something? My CrossRef connection file is dated March 2017. But that didn't change to my knowledge, although I did download it again (dated as updated in Mar 2017) but called it Crossref copy, so I doubt it would be recognized by the Endnote program.

(I downloaded it per the updated link to the knowledgebase article (from Mar 2017) but doubt that is why it is working for me know?)

Re: ** Failure with CrossRef search for any DOI **

If I understand correctly, the crossref connection file only needs to be updated for X7. This update has already been implemented in X8 and X9. So for most of us, the problem does not originate from the outdated connection file.

After I read your post, I did the online search with the crossref connection within EndNote X9 for the DOI